Artificial leg.



HLH. HANGER 5!]. E. HANGER, In.

ARTIFICIAL LEG, APucAnon mm 055.28. i916.

L2%7,673 Patented Nov. 2?, 191?.

HENRY HA3? AND JAMES HANGER, 5337)., OF 'WASHINGTGR, DISTRICT OFCGLUEIBIA, ASSIC-Z-HGRS 1'0 3'. E. HAHGE-liv, INCQRPQRATED, ACUEIEQRATION OF THE DISTRICT 01;? COLUMBIh.

m ners,

To aZZgo'kom it may concern: Be it known that we, Hnnm' Hoover: HANGERanal JAMss E; l'lANGER, J1., citizens of the 'ilnitecl Stat-es, residingat Washing- Speoifibetionof Letters IPatcnt.

ARTIFIGEEJQ LEG.

Potent-eel Nov. *2", lll it.

Application files hecemner 2S, 1916. Serial No. 2139.311.

scribed, and the lower end of the thigh scction is rounded, and isprovided with a vertical central slot it in the reruthereof ex tendingfrom its lower extremity to a point 5 ton, in the District of Columbia,have inabove the knee bolt to receive the back 69 vented certain new anduseful lrnprovecheck merits in Artificial Legs, of which the fol- Theknee bolt 3 is rigidly secured bythe lowing a specification. clampnut 6on the lower leg" section to per- @ur invention relates to artificiallegs, rnit the operation of the lower lee; by the l .anol pertains morepertioularly'to the knee lever arm 8 adjustably secured on the knee 65joints thereof, and to means for operating bolt. same. Said lever arm asshown in Figs 1 anrl 2 The object of our invention is to produce of thedrawings, comprises the arm portion --en improved knee joint forartificial legs 8, on the inner end of which is provided l provided withan operating lever carried the split ring 9 adapted to be clamped on mwithin the thigh section adapted to be och the knee bolt 3 by the setscrew 10 passing justsbly secured on the knee bolt to accolmthrough thelips A on the inner end, while inoclate the comfort and preference ofthe the outer or free end is provided with a "wearer. Another object ofour invention grooved wheel 11 over which the s'uspender 2% is toproduce an operating lever on the knee 12 is looped. Saicl wheel ispreferably one looltspi artificial legs having means by which rieol on alink pivoted on the outer encl the angle of the lever with relation tothe of the lever arm to permit the wheel to be vertical axis of the legmay be conveniently folded back when the wearer is in sitting and.easily changed to modify the action of position. so the lower legsection by the change of lever- For the purpose of limiting; themovement es age thus pro'rlucerl; and a still further obof the lower legsection and for centrally ject thereof is to produce :3.- inore simple,positioning the operating lever 8 thereon, I cheap encl eliicient kneebolt and joint for provide the back-check 5 comprising the barartificial legs and operating device therefor 5, which at its lower endis secured to 'the Eli than has heretofore been attained. back of thelower leg section while the oppo- To these ends, our invention includesthe site end is bifurcated at 13 and terminates combination enclsrrengementof component in a pair of ill-shaped yokes 14- which empartsto be hereinafter described and more brace the knee bolt 3 intermediateof enrls. psrticulerly pointed out in the claims. The lever 8 ispreferably positioned he as In the accompanying drawings, in which tweenthe bifurcated or forked member i l to like reference charactersindicate similar on the back check 5, by which it is held in parts, r asubstantially medial position on the bolt.

Figure l is a vertical sectional View of the In the embodiment of ourinvention shown knee joint of an artificial leg provided with. in Fig. 4of the drawings, the split ring is so our operating lever; looped. backonthe arm portion 8 anti is es 2 is a transverse sectional view of theclamped on the knee bolt by the set screw' same, 10 passing through thelips A and the Fig, 3 is s top view of our back check, lever arm 8. Thering and lever thus cle- Fig. 4 is a vertical sectional view of sscribed are held in adjusted position on the unmodified form thereof,and knee bolt by the screw B passing through Fig. 5 is a verticalsectional view taken the ring and bearing against the knee bolt. on theline 5-5 of Fig. 4. It will be understood that a suspender 15 Referringto the drawings, 1 designates of ordinary form is loopecl over the wheelthe thigh section of an artificial leg, and 2 11, by which the lower legis operated, and

indicates the lower leg section which at its it will be furtherappreciated that the 216- 05 uii'per encl fits over the lower end of theplstment of theangle oi the lever arm relathigh section anti is pivoteilthereto by the tive to the vertical plane of the leg may be bolt 3. Bothsections are hollow at had by the screws carried thereon to accorntheirazliacent ends to accommodate the opnioclatc some to the comfort onepeculiari ereting mechanism to he hereinafter (leties of the wearer.Snch ad nstments may ill) ' axis of the leg,

ha conveniently made with a screw driver through the vertical slot -l,and may be made to accelerate the movcnient of the lower leg section andextend additional tension thcreon with the suspcndcr by dcprcssing theouter end of the lever, or may be adjusted to relatively retard the l ccaction and case the tension oi the suspcndcr by raising the end of thelever, all to accommodate thc prefer ence and convenience of the user.

Harv thus described our invention, what we. claim as new and desire tobe sccurcd by Letters Patent, is:

1. In an artificial leg, the combination with a thigh section and alower leg section, of a lrncc bolt connecting san'ic rigidly connectedwith the lower log section, a laterally extending operating armadjustably secured on said knee bolt, means for readily altering theangle oi. said arm with. relation. to the vertical ot the leg, and asnspendcr connected with the. tree end of said arm, substantially asdescribed.

2. In an artificial leg, the combination with a thigh section and alower leg section, of a hnec bolt connecting same and rigidly connectedwith the lowcr'lcg section, a laterally extending operating armadjustably clamped on tho kneebolt intermediate of its ends, means forreadily altering the angle of said arm with relation to the vertical anda suspcnder connected with the tree and of the lever, substantially asdescribed.

3. in an. artificial log, the combination with a thigh section and alower lag section, of a. knee bolt pivotally connecting same rigidlyattached to the lower leg section, alatcrally extending mgcrating armadjustably secured on said knee bolt, a back-check attached. to the rearof the lower leg section at its lower end and embracing said b11188 boltat its upper and, and. a suspendcr conncctcd with the freo end of saidoperating arm, substantially described.

4-. ln an artificial leg, the combination with a thigl'i section and alower leg section, of a knee bolt pivotally connecting same rigidlyatachcd to the lower log section, a

laterally extending operating arm adjust ably secured on said lrnccbolt, a back-check attached to the rear of the lower leg section at itslowcrcnd and having a forked upper end embracing said hnrc bolt and theinner end of said operating 2: iii, and a Suspender connected with thefree outer end of the operating arm, substantially as described.

5. In an. artificial leg, the combination with a thigh section and alower leg section,

of a knee bolt pivotally connecting same and '50 rigidly attached to thelower leg section, a laterally extending operating arm adjust ablysecured to said knee bolt, means for readily altering the angle of saidarm with relation to the vertical axis of the log, a

groox 'cd wheel connected with the arm, and a Suspender looped over saidwheel, substantially as described.

6. In a11a1'ti.cial. log, the, combination with a thigh section and alower leg section,

of a knee bolt pivotally connecting same and rigidly attached to thelower leg section, a laterally extending operating arm adjustablysecured to said knee bolt, a limit pivotally carried on the free end ofsaid arm, 25

a grooved wheel carried on thcfrec end of said link, a'bifurcatcdback-check attached to the rear of the lower leg section at one and andQB'IbIRClZQg the knee bolt and inner end of sail opcrating arm at itsopposite as end, and a Suspender connected with th wheel on the free endof said link, substan-' tially as described.

7. In an artificial leg, the combination with a thigh section and alower leg section,

of a knee bolt pivotally connecting same and rigidly connected with saidlower leg section, a latcrallycxtending operating arm looped around theknee bolt at its inner end,

a set scrcw for clamping said looped por- 96 .tion on the knee bolt toset the arm at difi'ez cnt angles, a wheel carried on the outer free 7end of the arm, a set screw for ad ust'ably positioning the loopedportion on the knee bolt, and a suspender connected with said groovedwheel, substantially as described.

8. In an artificial leg, the combinatior with a thigh section and alower leg'scction,

of a knee bolt connecting same and rigidly connected with the lower legsection, a lat- 100 orally extending arm adjustably secured on said kneebolt at one end, means for readily altering the angle of said arm withrelation to the vertical axis of the log, a link pivotally carried onthe frcc em if said arm, 10 8

